Soluble triarylamine functionalized symmetric viologen for all-solid-state electrochromic supercapacitors  

作　　者：Yanling Zhuang Weiwei Zhao Longlu Wang Feiyang Li Weikang Wang Shujuan Liu Wei Huang Qiang Zhao 

机构地区：[1]Key Laboratory for Organic Electronics and Information Displays&Jiangsu Key Laboratory for Biosensors,Institute of Advanced Materials,Nanjing University of Posts and Telecommunications,Nanjing 210023,China [2]Frontiers Science Center for Flexible Electronics&Shaanxi Institute of Flexible Electronics,Northwestern Polytechnical University,Xi’an 710072,China

出　　处：《Science China Chemistry》2020年第11期1632-1644,共13页中国科学（化学英文版）

基　　金：This work was supported by the National Funds for Distinguished Young Scientists(61825503);the National Natural Science Foundation of China(61775101,61804082);the Priority Academic Program Development of Jiangsu Higher Education Institutions(YX030003);Natural Science Foundation of Jiangsu Higher Education Institutions(18KJB430021);the China Postdoctoral Science Foundation Funded Project(2018M642286);Jiangsu Planned Projects for Postdoctoral Research Funds(2019K047A);Natural Science Foundation of Jiangsu Province of China(BK20180760);Science Foundation of Nanjing University of Posts and Telecommunications(NY217142).

摘　　要：Electrochromic supercapacitors have drawn enormous attention due to their ability to monitor the charge and discharge processes through color changes of electroactive materials.However,there are few work on small organic molecules as active materials for all-solid-state electrochromic supercapacitors.Herein,we reported two novel multifunctional symmetric viologens(TPA-bpy and CZ-bpy),which showed different solvatochromic,electrochromic,electroluminochromic and energy storage behaviors despite their similar chemical structures.The different performances between these two viologens were attributed to the difference in the intramolecular charge transfer capability and the solubility in organic solvents.Devices containing TPA-bpy displayed faster response time and higher coloration efficiency due to the introduction of packing-disruptive and three-dimensional triarylamine groups.Moreover,devices containing TPA-bpy also showed energy storage characteristics with an obvious color change from purple to yellow.It showed a wide voltage window(2.0 V),long discharge time(230.3 s at 0.01 mA cm−2),and excellent cycling stability with 90%capacitance retention after 6,000 cycles.The work provides a new and convenient strategy towards the development of novel electrochromic capacitive materials.

关 键 词：VIOLOGEN SOLVATOCHROMISM ELECTROCHROMISM electroluminochromism SUPERCAPACITORS 

分 类 号：TM53[电气工程—电器] TB34[一般工业技术—材料科学与工程]